 But here's one, John. We always end off positively with the mystery of the week. And the big story goes like this. Geologists are claiming that the inner core of the Earth has slowed or stopped spinning and has reversed. Well, the liquid core, the outer liquid core, is what controls the magnetism on the planet. In other words, it's like a dynamo. It's constantly spinning. But somehow, the inner core, which is actually metallic, it's about the size of Texas, maybe some 770 miles in diameter.